After upgrading to ST10 the Where Used search locations (folders) are displaying as Red in color even though the location has been indexed. If all is correctly configured, you should have the Where Used results dialog returned without having to select locations in which to query.
Solution This problem will occur if you do not use the Fast Search Server configuration interface to build the index, but instead build the index using the Index Options interface in Control Panel.
Hardware/Software Configuration Platform: INTEL
OS Version: 1064